We should buy potential one and I personally suggest to buy BNB, Cardano, Cake, Dot, Matic. It may takes longer time to get a smart earning but it almost sure that you'll be able to get good profit. You need to analyze market before invest a coin to avoid risk.
Ethereum has also been looking great so far this year and especially this month by creating a new ATH at its price, so apart from what you suggested, I also have a few suggestions to add to a good investment thing like Ethereum.
Etherium was still looking good for us to invest but if we need to be a different must better to choose BNB, XRP, Catdona Ill think these kind of altcoins has have a future to be like Etherium. We all seen of what happen etherium right has one of the highest prices increasing in this year. There are some altcoins also are not totally waking up and waiting for the time on them to rise the price but suddenly hard to find.